(m-2)/(2m^2-8)-m/(2m^2+6m)
问题描述：
(m-2)/(2m^2-8)-m/(2m^2+6m)
答
2m^2-8≠0m≠±2
2m^2+6m≠0 m≠-3
化简,提取公因式,合并